Pyroxylin plastic tab or facing and method of securing the same to an article



Dec. 20, 1932. c. F. RAND PYROXYLIN PLASTIC TAB OR FACING AND IETHOD 0F SECURING THE SAME TO M ARTICLE Filed May 26, 1930 C lnllflzw 7/2 IIIIIIIIIIIfir 0 IIQV/IIIZIIIIIIIIIIIIZZ7 flll'v/llllillllllllllll! I 7 15 making the same.

Patented 15. 20, 1932 UNITED STATES PATENT oFF1cE CHARLES FPBAND, OF NORTH TONAWANDA, NEW YORK PYBOXYLIN PLASTIC TAB OB FACING AND METHOD OF SECURING THE SAME 'ro AN ARTICLE Application filed May 26,

This invention relates to a pyroxylin plastic tab or facing and method of securing same and, more particularly to a record card or the like. Although the invention'can be used 5 wherever it is desirable to apply a sheet of pyroxylin plastic to any article by simply moistening the gummed surface and still have the entire face of the card or article legible, including that part to which the.

sheet is attached.

This applicationis a continuation in part of my copending application filedMay 24, 1930, Ser. No.,455,283 for metal index guide having'a pyroxylin plastic tab and method of The invention is shown more particularly in connection with a record card having an upwardly projecting U -shaped pyroxylin plastic tab, the legs of which are secured to 2 the opposite faces of the card. I It will alsobe understood that the invention comprehends tabs made from cellulose. acetate as well as those made from cellulose nitrate. On such cards the places of attachment of the tab often have printed matter and it is desirable to have this printed matter legible through the tab. It is, therefore, the principal object of this invention to provide such a pyroxylin plastic tab or other facing for a record card'or the like which is firmly cemented or held to the record card by simply moistening the gummed side and. through which any printing on the card is clearly legible.

Heretofore attempts have been made to cement the legs of such tabs directly to the opposite sides of the record card by a transparent water soluble glue or cement but a satisfactory bond could'not be obtained be- 40 tween the two and they would crack \and separate when dry. It has therefore been the standard practice to secure strips of cloth or fabrikoid having one side coated with water soluble glue to the legs of the tab and then glue the strips to the card. The printing on the card'was not, of course, visible through this opaque cloth or fabrikoid. v The present invention proposes to provide a record'card or the like faced with a sheet of pyroxylin plastic or equipped with a 1930. Serial no. 455,943.

pyroxylin plastic tab. A. sheet of transparent'pap'er such as glassine paper coated on one side with water soluble glue is interposed between the card and the pyroxylin plastic and bonded thereto by the facing of the pyroxylin plastic being dissolved by a mixture of monoethyl ether of ethylene glycol and diethylene glycol in which the transparent paper has been immersed. The tab or facing is then secured to the card by a strong, transparent glue, such as fish glue with which the opposite side of the trans- Card having a pyroxylin plastic tab attached I in accordance with my invention.

Figure 2 is an end view thereof.

Figure 3 is a perspective view of a document or paper sheet faced with a sheet of pyroxylin plastic in accordance with my. in-

vention for its preservation.

Figure t is a fragmentary edge new of a .pyroxylin plastic tab shown in Figures 1.

and 2.

between the record card and the tab.

Figure 6 is a view similarto Figure 5 showing the piece of glassine paper faced with a 'water soluble glue immersed in a solution of monoethyl ether of ethylene g1ycol and diethylene glycol.

, e0 Figure 5 is an edge view of the strip or 'piece'of glassine paper which is interposed Figure 7 is a fragmentary edge view of the tab showing the glued and immersed piece of glassine paper, pressed on the pyroxylin plastic tab and the'tab ready to be applied to the index card.

Figures 8-12 show a modification 'of in I invention in which figures:

Figure 8 is a fragmentary edge view of the pyroxylin plastic tab.

Figure 9 is an edgeview of the piece of glassine paper.

Figure 10 is a view similar to Figure 9 showing one .face of the glassine paper roughened.

Figure 11 is a view similar to Figure 10 showing a pyroxylin plastic cement applied to the roughened face of the glassine paper.

Figure 12 is a view showing the roughened face of the glassine paper cemented to the pyroxylin plastic tab by the pyroxylin plastic cement and the opposite face of the glassine papder glued for attachment to the record car Similar reference numerals refer to likeparts in each view.

Referring more particularly to thepreferred form of the invention shown in Figures 1, 2, and 1-7, the invention is illustrated in connection with an indexed record or file card 15 which can be of any form or size to meet recording or filing requirements and is either blank or has one or both of its faces printed to facilitate the keeping of records. At the upperside of this card and to the opposite sides thereof an index tab 16 is secured. This index tab is made of transparent sheet pyroxylin plastic, which is creased and folded to form two legs 17 which straddle the upper edge of the record card 15. The base 18 of each of these legs 17 is preferably enlarged so as to provide a larger attaching surface. The U-shaped upper end of the tab projects above the edge of the record card 15 and forms a pocket into which is slipped a plain or folded paper strip 19 on which the index word or letter is written. With a stack of such record cards it is apparent that the tabs project out from the stack and the index words or letters on the paper strip 19 are clearly visible through the sides of the pyroxylin plastic tab.

in securing the bases 18 of the two legs 17 of the pyroxylin plastic tab to the index card, two strips 20 of transparent paper are employed and for this purpose glassine paper gummed with water soluble glue has been found entirely satisfactory. Each of these strips of pieces of glassine paper conforms to the shape of the base 18 of the corresponding leg and on one side each strip is coated with glue as indicated at 21. This glue can be one of a large number of adhesives, such.

as animal or vegtable glue, dextrin or the like, but is preferably water-soluble and on .account of its greater transparency and aderable for the present purpose.

The piece of glassine paper is then dipped in a bath composed of monoethyl ether of ethylene glycol GH OHBH OC IL commonly known "as cellosolve, and diluent such as diethylene glycol crnorrcnzocrrrcnzon or alcohol, the proportions being varied in accordance with variations inthe materials is obtained at their cont acting faces. This bond is obtained by the dissolving of a part of the pyroxylin plastic body of the tab through the medium of the monoethyl ether of ethylene glycol and this dissolved pyroxylin plastic forms a firm bond between the pyroxylin plastic and the glassine strip pressed against it. Other solvents of the pyroxylin plastic or cellulose acetates can, of course, be employed, such as butyl, ethyl or amyl acetates, or methanol or the like.

Both legs of the tab have such a piece 20 of glassine paper cemented thereto and thereafter, or before, the pyroxylin plastic tab- 16 can be creased and bent into U-form. The opposing glued faces 21 can then be moistened and the two legs pressed together about the record card and held until firmly bonded.

A tab applied in this manner is firmly held to the record card and'will not break or crack o-fi' even under severe and continued handling. At the same time the printing or records under the tab are clearly visible through the tab, piece of glassine paper and the fish glue and the pyroxylin plastic binders.

It is obvious that the invention .canbe em ployed in fields other than in securing index tabs or analogous arts. For example, it can be used to face the entire surface of cards or valuable documents to effect their preservation. Such a use is shown in Figure 3 in which the document 150: to be preserved is faced in its entirety with a sheet of pyroxylin plastic 1611, a sheet of glassine paper being interposed and united to the pyroxylin plastic sheet 16a by means of the monoethyl ether of ethylene glycol and to the document 15a by fish glue in the manner described. By this means the entire face of the document is firmly cemented to the transparent sheet of pyroxylin plastic and at the same time the printing on the same is clearly visible and protected against dirt and abrasion.

The process can be carried out by another process which is illustrated in Figures 8-12, and a firm transparent bond between the pyroxylin plastic sheet and the tab or the like obtained, but as this process is more costly it is not preferred. In this modified form, the strip or piece of glassine paper 20 is roughened on one side as indicated at 25 and thereafter the opposite unroughened face is coated'with fish' glue or other suit- 15 Urea (stabilizer) able water-soluble adhesive 26. The roughened side is then coated with a pyroxylin plastic cement 27 which consists of pyroxylin plastic scrap dissolved in suitable solvents and having'a small amount of stabilizer, a

suitable cement being made according to either of the following formulas:

Pyromylz'n plastic cement Parts Pyroxylin plastic scrap 100 Amyl acetate 1200 Methanol -Q. 1800 Ethanol 600 Acetone s Pyrowg/Zin plastic cement Parts Pyroxylin 70 Camphor or similar plasticizer 2O Urea (stabilizer) 1 The roughened side coated with "the pyroxylin plastic cement is then pressed against the pyroxylin plastic tab and the tab firmly 25 united to the transparent glassine paper.

The glue 27 is then moistened and the tab united to the record card 15 as in the pre ferred form of the invention.

. Each form of the invention provides a py' 3O roxylin plastic tab or facing for articles and method of securing the same which is inexpensive of construction, adapts itself to low cost production methods and provides a strongly held tab or facing which will stand severe use and which does not in any way impair the legibility of any reading matter on the card or article.

Having fully described iny invention, I claim: o r

1. An article of the character described, including an opaque body, a piece of solid pyroxylin plastic'or the like adapted to be securedto one face of said body, a piece of transparent paper interposed between said body and said piece of pyroxylin plastic and adhesive means applied to-the opposing faces ofsaid piece of transparent paper and'said body and piece of pyroxylin plastic.

2. An article of the character described,

0 including abody, a piece of pyroxylin plastic or the like adapted to besecured to at least one facefof said body, a piece of trans parent paper interposed betweensaid body and said piece of pyroxylin plastic, a water soluble, transparent adhesive uniting said piece of transparent paper with 'said body and. transparent adhesive means uniting said piece of transparent paper with saidpiece of pyroxylin plastic.

3. An article of the character described, including a fibrous sheet body, a sheet of pyroxylin plastic or the like adapted to be secured to at least one face of said body, a piece of transparent aper interposed between said body and said piece of pyroxylin plastic, fish glue uniting said piece of transparent paper with said body and transparent adhesive means uniting said piece of trans-.'

parent paper with said sheet of pyroxylin plastic.

4. An article of the character described,

including'a body, a piece of sheet pyroxylin plastic or the like adapted tobe secured to at least one face of said body, a piece of transparent paper interposed between said body and said piece of pyroxylinplastic, a transparent adhesive applied to the opposing faces of said transparent paper and said body and transparent adhesive means including dissolved pyroxylin plastic applied to the opposing faces of said piece of transparent paper and said piece of pyroxylin plastic.

5. An article of the character described, including a body, a piece of sheet pyroxylin plastic or the like adapted to be secured to at least one face of said body, a piece of transparent paper interposed between said body and said piece of pyroxylin plastic, a transparent adhesive uniting said transparent paper With said body and transparent adhesive means including pyroxylin plastic dissolved in a solution composed of monoethyl ether of ethylene glycol and-diethylene glycol uniting said piece of transparent paper with saidpiece of pyroxylin plastic.

6.- An article of the character described, including a body, a pieceof sheet pyroxylin plastic or the like adapted to be secured to one face of said body, a piece of glassine paper interposed between said body and said piece of pyroxylin plastic,-and transparent adhesive means applied to the opposing faces of said piece of glassine paper and said body and said piece of'pyroxylin plastic.

7. An article of the character described, including a body, a piece of sheet pyroxylin plastic or the like adapted to be secured to to the opposing faces of said glassine paper and said piece of pyroxylin plastic andia transparent adhesive applied to the opposing iaces of said piece of glassine paper and said od s 9. A new article of manufacture, including a body of transparent pyroxylin plastic or the like, a piece of trans arent paper and a transparent adhesive'app ied to the opposing faces of said piece of paper and said a transparent adhesive including pyroxylin plastic dissolved in a mixture of diethylene glycol and monoethyl ether of ethylene glycol uniting said piece of paper and said pyroxylin plastic body.

12. A new article of manufacture, including a body of transparent pyroxylin plastic or the like, a piece of transparent paper, a transparent adhesive including pyroxylin plastic dissolved in a-mixtureof diethylene glycol and monoethyl ether of ethylene glycol uniting said piece of paper and saidpyroxylin plastic body, and a facing of fish glue on the outer face of said piece of transparent paper.

13. A new article of manufacture, including a body of transparent pyroxylin plastic or the like, a piece of glassine paper and a transparent adhesive applied to the opposing faces of said glassine paper and said pyroxylinplastic body, the exposed face of saidglassine paper being adapted to receive a coating of adhesive.

"14. A new article of manufacture includ-\ ing a body of transparent pyroxylin plastic or the like, a piece of glassine paper and a transparent adhesive including dissolved pyroxylin plastic applied tothe opposing faces of said piece of glassine pyroxylin plastic body.

15. A new article of manufacture including a body of transparent pyroxylin plastic or the like, a piece of glassine paper and a transparent adhesive including pyroxylin plastic dissolved in monoethyl ether of ethylene glycol uniting said glassine paper and said pyroxylin plastic body.

paper and said paper with its opposite side against said pyroxylin plastic.

18. An article of the character described, including an opaque body, a piece of pyroxylin plastic or the like, and means, in-

cluding a water soluble adhesive, cementing said piece of pyroxylin plastic to one face of said body, said piece of pyroxylin plastic and the cementing means being transparent so.

that the surfaceof said body covered by said piece of pyroxylin plastic is visible therethrough.

19. An article of the character described comprising a piece of pyroxylin plastic or i layer of a water soluble hardening adhesive and a second adhesive layer uniting said water soluble adhesive layer to said piece of pyroxylin plastic for cementing said piece of pyroxylin plastic to one face of said body, said piece of pyroxylin plastic and the'cementing means being transparent so that the surface of said body covered by said piece of pyroxylin plastic is visible therethrough. 21. An article of the character described, comprising a piece of pyroxylin plastic or the like, a layer of a hardening transparent water soluble adhesive, and a second adhesive layer uniting said water soluble adhesive layer to one face of said piece of pyroxylin plastic whereby said piece of pyroxylin plastic can be cemented to a body byimoistening said water soluble adhesive layer and the surface of said body covered by said piece of pyroxylin plastic is visible 'therethrou'gh.

In testimony whereof I hereby afiix my signature.

CHARLES F. RAND.

16. The hereindescribed method of making an adhesive pyroxylin plastic tab or the like which comprises applying a pyroxylin plastic solvent to a pieceof transparent paper and then pressing said treated paper against saidpyroxylin plastic tab.

17. The hereindescribed method of making an adhesive transparent pyroxylm plastic tab or the like which comprises coating one side of the'transparent paper with a water-soluble transparent adhesive, immersing said adhesive coated'paper in a solution containing monoethyl ether of ethylene glycol and pressing said immersed 

